(RHSA-2021:3548) Moderate: kernel security, bug fix, and enhancement update

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: SVM nested virtualization issue in KVM (AVIC support) (CVE-2021-3653)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

• RHEL8.4 Nightly[0308] - HST:STC950:Fleetwood: LPAR crashed during LPM: BUG at lib/locks.c:34! (using ibmvfc) (BZ#1969792)

• RHEL8.2 - s390/vtime: fix increased steal time accounting (BZ#1988386)

• [FJ8.4 Bug]: Installation of RHEL8.4 hang up on a Tatlow platform while loading intel_lpss_pci module. (BZ#1989560)

• kernel panic in drm_fb_helper_dirty_work() caused by a race condition qxl driver (BZ#1992839)

• [RHEL8.4] TIOCGSERIAL ioctl fails on serial device (BZ#1993872)

• RHEL8.4 Nightly[0208] - kernel panic when executing test case for persistent device configuration (using DASD) (BZ#1995206)

• Killing ceph daemon leaving an unhealthy ocs/ocp cluster (worker node/s NotReady) (BZ#1995862)

• ceph: potential data corruption in cephfs write_begin codepath (BZ#1996680)

• libceph: allow addrvecs with a single NONE/blank address (BZ#1996682)

• [iavf] traffic stops after host sets vf trust on (BZ#1997536)

• [ice][iavf] hit some call trace and system panic when create-remove-vfs in loop (BZ#1997538)

• Missing backport of IMA boot aggregate calculation in rhel 8.4 kernel (BZ#1997766)

• XArray tests broken for single processor (BZ#1997997)

• [RHEL-8.4] mlock() end up returning -EINVAL instead of -ENOMEM in rewriting the upper address bits. (BZ#1997998)

• Kernel panic at n_tty_set_termios+0x30 (BZ#1997999)

• [ice]BUG: scheduling while atomic: ifenslave/270215/0x00000200 (BZ#2000129)

• [ice]port lost connectivity after removing from bonding (BZ#2000130)

Enhancement(s):

• [Mellanox 8.5 FEAT] mlx5: drivers update upto Linux v5.12 (BZ#1983681)